You are in control of Zippy Airport. As the flight controller, you're supposed to manage and direct the planes and their take-offs and landings. Press the planes when you want to put them in a ramp for fueling, maintenance, or just let the passengers get off the plane. You'll press the Take-Off button when they are ready to go. Don't let the planes pile up or they will crash! Also, when a plane takes off it has a chance of crossing paths with the planes that are coming in from landing. There is little control over those although you can work to time it right. Play Zippy Airport and see how many levels you can go before crashing!